Cooky machine



Jan. 26, 1954 A. A. KOTTMANN ET AL COOKY MACHINE Filed May 6, 1950 8 Sheets-Sheet l f AMF-EUR A. Kom-MANN BY RAUL C. BAUER ATTORNEYS V INVENTOR ARTHUR A. KOT'IMANN BY PAUL C. BAUER ATTORNEYS Jan. 26, 1954 A. A. KQTTMANN ET AL COOKY MACHINE Filed May 6, 1950 lJan. 26, 1954 A. A. KOTTMANN ET AL COOKY MACHINE Filed May 6. 1950 ARTHUR A. KoTrMANN Jan. 26, 1954 Filed May 6, 1950 A. A. KOTTMANN ET AL COOKY MACHINE 8 Sheets-Sheet 4 Fi?. E

f-- l l 1 a y NVENTOR ARTHUR A. KOTTMANN PAUL c. BAUER www @t ATTORNEYS Jan. 26, i954 .A. A. KOTTMANN ET AL 29%?39 COOKY MACHINE Filed May 6, 1950 8 Sheets-Sheet 5 ff@ ,11) /48 A* l /56 7 67 y 96 .fw ft/5 Eff 7. 7 5

5 INVENTOR ARTHUQ A. KOTTMANN AUI. c', BAUER ATTORNEYS Jan, 26 1954 A. A. KOTTMANN ETAL 2,657J3v cooKY MACHINE:

8 Sheets-Sheet 6 Filed May 6, 1950 A lNvENToR Y A. KOTTMANN PAUL c. BAER ATTORNEYS `Han. 26, i954 A, A, KOTTMANN ETAL 2,667,130

COOKY MACHINE Filed May 6, 1950 B Sheets-Sheet '7 ZZ 7 l' 228 INVENTOR ARTHUR A. KOTTMANN ATTORNEY Jan. 26, 1954 A. A. KOTTMANN ET AL 2,667,130

cooKY MACHINE File@ May e, 195o s sheets-sheet s INVENToR ARTHUR A. KOTTMANN PAUL c. BAUER ATTORNEYS Patented Jan. 26, 1954 UNITED STATES ATENT OFFICE l COOKY MACHINE land Application May 6, 1950, Serial No. 160,501

9 Claims.

This invention relates to automatic baking equipment for receiving a batter or dough and forming it and baking it during its passage through the machine to produce finished baked goods. More 'particularly the invention relates to an automatic machine for making cookies.

A general object of the invention is to provide an improved machine of the type adapted to feed formed dough from a hopper to an endless conveyor for passage through an oven in which the dough is baked to a suitable device for removing finished baked goods in condition for packaging or display.

More particularly, it is an object of the invention to provide an improved mechanism for cutting the dough as it emerges from forming dies so as to obtain a full clean cut during each cutting cycle.

A further object of the invention is to provide a mechanism for cutting the dough which can be readily adjusted for cooperation with any of a group of interchangeable forming dies of different sizes and shapes.

Another object of the invention is to provide an improved cut-off mechanism for cutting the dough as it is extruded from the dies with a clean full cut, While avoiding any tendency to throw the cookies as the cut is completed, whereby accurate spotting of the cookies on the tray is possible.

Still another object of the invention is to provide a mechanism for moving a reciprocating cutting wire along substantially a straight line cutting path with provision for readily adjusting both the vertical position and length of the cutting path without materially altering the substantially straight line character of the cutting path.

The present application is coniined to the cutoff mechanism for cutting the dough as it emerges from forming dies, as indicated by the foregoing statement of the objects of the invention. Other novel features of the machine disclosed herein are the subject of a copending application Serial No. 170,588 filed June 27, 1950, in the name of Arthur A. Kottmann as sole inventor.

Still other objects and advantages of the invention will become apparent from the following speciiication and from the accompanying drawings in which a. preferred embodiment of the invention is illustrated.

Referring to the drawings:

Figure l is a side elevation of the machine with certain portions broken away and others shown in section, the general arrangement of the moving mechanical parts contained therein being 2 shown somewhat diagrammatically withY numerous details being omitted for simplicity;

Fig. 2 is a fragmentary side elevation of the machine, on an enlarged scale, with a portion of the housing broken away to show details of the power mechanism and its association with the various individual mechanisms driven thereby;

Fig. 3 is an end elevation of the machine, on the same scale as Fig. 2, with a portion of the housing broken away to show further details of the power mechanism and its association with the various individual mechanisms driven thereby; y

Fig. 4 is a fragmentary plan view, on a still further enlarged scale, showing the dough hopper, feed-rolls, and forming dies;

Fig. 5 is a side elevation of the dough hopper and associated parts, on the same scale as Fig. 4, portions of the hopper and associated parts being broken away or omitted to show the interior construction;

Fig. 6 is a fragmentary end elevation of the dough hopper and associated parts, on the same scale as Figs. 4 and 5, portions of the mechanism being broken away to show how. the feedrolls are mounted and driven;

Fig. '7 is a fragmentary side elevation, on the same scale as Figs. 4 to 6, showing the drives for the hopper feed-rolls and the cut-off mechanism, and also showing the mechanism for positioning the path of travel of the cookie trays the desired distance below the forming dies and for adjusting the positions of the trays along their path of travel with reference to the timing of the feed rolls and the cut-off mechanism;

Fig. 8 is a section taken as indicated by the line 8--8 in Fig. '7;

Fig. 9 is a fragmentary side elevation, similar to a portion of Fig. '7, but showing'the parts in positions corresponding to a different stage in their cycle of operation;

Fig. 10 is a vertical section on a further enlarged scale through a portion of the mechanism of Fig. 9, the section being taken as indicated by the line lil-I0 in Fig. 11;

Fig. 11 is an end elevation, on the same scale as Figs. 4 to 9, showing a portion of the mechanism of Fig. '7 viewed as indicated by the line H-Il in Fig. 7; 3

Fig. 12 is a plan view of the cut-off mechanism,

' on the same scale as Figs. 4 to 9;

and for adjusting the positions of the trays along their path of travel with respect to the timing of the feed-rolls and the cut-off mechanism, the view being taken as indicated by the line |3I3 in Fig. 7 and certain parts being broken away;

Fig. 14 is a plan View, partly in section, of a positive clutch mechanism for engaging and disengaging the drive for the hopper feed-rolls and the cut-off mechanism;

Fig. 15 is a side elevation of a portion of the mechanism of Fig. 14, taken as indicated by the line I-I5 in Fig. 14;

Fig. 16 is a fragmentary sideelevation, similar to a portion of Fig. 7, showing in solid lines the relationship between a slightly modified tray, the cut-off mechanism, and a relatively small die as a cut is being completed, and showing in phantom outline the corresponding relationships when employing a larger die for producing cookies of a greater diameter;

Fig. 17 is a fragmentary end elevation taken as indicated by the line I'I--I'I in Fig. 1 and showing the take-olf mechanism on thevsame scale as Figs. 2 and 3;

Fig. 18 is an enlarged, fragmentary, vertical section through the take-01T mechanism, taken as indicated by the line I8-I8 in Fig. 17; and

Fig. 19 is a section on a still further enlarged scale, taken as indicated by the line I9-I9 in Fig. 18.

Referring principally to Fig. 1, the machine shown therein is substantially rectangular in profile having a generally fiat top about shoulder high to an average size man. This form is preferred from the appearance viewpoint and also to permit an operator to stand at one end of the machine and see over the top thereof to the opposite end. The functional units of the machine, shown diagrammatically in Fig. 1 for simplicity, are all supported on a unitary base structure I and are preferably enclosed by a shell or housing having suitable side, end, and top panels, as described in more detail hereinafter.

The principal functional units of the machine comprise a dough hopper 2 equipped with feedrolls and dough forming dies; an associated cutoiT mechanism 3 (Figs. 2, 7, 9, and 10) for cutting the dough emerging from the forming dies; an oven 4; a take-off device 5; a tray cleaning brush 6; an endless chain conveyor I that carries a multiplicity of trays 8, in uniformly spaced apart relationship, from the hopper 2, into and through the oven 4, to the take-off device 5, and thence to the cleaning brush 6 and back to the hopper 2; and a common power mechanism 9 (Figs. 2 and 3) for driving the hopper feed-rolls, the cutoff mechanism 3, the brush 6, and the conveyor 1.

With machines of the character shown in Fig. 1, the capacity of the machine is controlled by the baking time required for a particular type of cookie to be produced. Since the oven space above the source of heat is substantially filled with trays B moving along a switch-backing path, the lengthv of the conveyor path within an oven of a given size cannot be increased to permit speeding up the conveyor 1. Thus, if the elapsed time during which a particular tray remains in the oven is to be kept constant, the capacity of the machine (represented by the width of the trays and the speed of the conveyor) can only be increased by substituting a larger oven to provideY a longer path of travel for the trays within the oven and permit movement of the trays at a higher speed, or by increasing the width of the machine to accommodate wider trays. The rst of these alternatives is the only practical one from the standpoint of economy of manufacture, for the second alternative would require altering the dimensions of every functional unit in the entire machine for each change in the capacity of the machine.

A feature of the invention, therefore, resides in the general arrangement and relationship of the various parts of the machine to permit the manufacturer to make machines of different capacities by merely employing ovens of different lengths and by varying the length 0f base I and the length and speed of travel of the conveyor 'I accordingly, without materially altering any of the other functional units of the machine. The speed of the conveyor I may be increased or decreased in this manner for varying the capacity of the machine while keeping the critical baking time unchanged. To illustrate in the drawings how the machine is adapted for the substitution of ovens of varying lengths, the oven 4 and the several horizontal reaches of the conveyor 'I within the oven are shown broken transversely at A, and similar breaks are shown in the base I and in the conveyor 1.

The oven contains suitable apparatus for supplying and distributing heat, such as conventional gas burners II and an arrangement of heat distributing baies I2. Electrical or gas flash heaters may also be disposed where needed within the oven. A preferred arrangement of flash heaters includes a plurality of heating units I3 at the top of the oven for setting a skin on the dough quickly as the trays begin their horizontal travel through the hot zone of the oven, and a plurality of additional heating Vunits I4 disposed above the lowermost horizontal reach of the conveyor within the oven for browning the cookies before they leave the oven. The number of burners, baiiles, and flash heaters and their distribution in the oven should be varied, of course, with changes in the length of the oven and in the speed of travel of the trays therethrough. The oven is also equipped with a flue hood I6 and a flue pipe Il for conveying gaseous products of combustion away from the oven.

Since the structural details of the oven itself form no part of the present invention, most of the structure of the oven and the equipment contained therein is merely shown diagrammatically in the drawing. Only those details of the oven frame that are deemed essential to a clear understanding of the above described feature of the invention are shown.

Referring now to the structure of the machine in more detail, the base I may comprise a pair of longitudinally extending channel members I8 and suitable transverse braces I9. The portion of the frame surrounding the hopper 2, the power mechanism 9, and the various parts associated therewith may be any suitable self-sustaining structure for supporting an enclosing shell or housing. Such a shell may comprise a top panel 2l, an end panel 22, and opposite side panels 23 and 24. Adjacent the oven 4, the top and side panels 2|, 23, and 24 are preferably secured to suitable vertical frame members 26 (only one being shown) that may be welded to the base channel members I8 and connected at their upper ends by a transverse frame member 21. These frame members may be of any suitable form such as the angle members shown.

The mechanical parts beyond the oven at the opposite end of the machine are preferably similarly enclosed, as by a top grillwork panel 30 (Fig. 17), an end panel 3I, and opposite side panels 32 and 33, preferably having screen windows therein (not shown) to obtain adequate air circulation. These panels may be supported by any suitable self-sustaining frame structure and may include vertical angle members 36 (only one being shown) welded at their lower ends to the base channel members i8 and connected at their upper ends by a transverse angle member 31.

The oven [i may be of any suitable design, as indicated above, but will generally include an enclosing shell or housing such as 38 lined with suitable insulating material 3S.

The oven structure should be of an appropriate length to rlll the space between the vertical frame members 26 toward one end of the machine and the vertical frame members 38 toward the opposite end of the machine. It is preferably constructed as an independent, self-sustaining unit and may rest upon the base channel members 8 and be bolted or otherwise suitably secured to the vertical frame members and 35. The oven shell 38 should provide an opening lil at one end large enough to permit the conveyor 1 to enter the oven at the bottom and with another opening 42 at its opposite end to permit the conveyor to leave the oven at the bottom.

With the general arrangement described above, the machine may be designed to receive ovens of any desired length merely by constructing the machine upon a base of sufficient length to accommodate the oven between the vertical frame members 25 and 36.

Referring next to the hopper 2 and its associated parts (Figs. 4, 5, and 6), the longitudinal dimension of the hopper will, for convenience, be considered as extending transversely of the machine, and the following descriptive text will be phrased accordingly. The hopper frame comprises an upper, dough-receiving, housing section i3 and a lower, feed-roll housing section d4, each preferably being formed as a unitary casting. The upper housing section 43 denes a dough-holding chamber and is preferably divided into any desired number of compartments, such as the compartments d5, 4S, and 41, by upper transverse division plates or partitions 48 and lower transverse division piates or partitions (i9. Each of the upper division plates 43 is shaped to conform to and abut against the downwardly converging side walls of the upper housing section; and each preferably extends somewhat I spectively aligned and abut edgewise with the upper division plates i8 to continue the compartment divisions down through an outlet passage extending to the bottom of the hopper. The lower division plates may be supported on transversely extending ribs 53 of the lower housing section and held aligned therewith by dowel pins 511i welded in the lower edges of the partitions. The bottom of the lower housing section slidably received a plurality of dough forming dies 55, preferably corresponding in number and length to the compartments 45, d5, and 41. As shown, each of the dies extends the full length of the associated compartment and may be provided with any desired number of extrusion openings 56. The number of extrusion openings 56 may be different in each die if desired, andtlrie shapes of the openings may also be varied to produce with one cut a desired number of cook- .s chamber.

ies of assorted shapes and sizes; or, of course, if a large number of identical cookies are required, the three dies may be identical as shown in the drawing. All dies to be employed in the machine should have their orifices at the same level and in alignment longitudinally of the hopper along the edges.

The dies are shown as being slidable into place from the right hand end of the machine, as viewed in Fig. l, and transversely extending guide bars 51 and 58 are bolted or otherwise secured to the ends of the bottom of the lower housing section 4d for this purpose. Intermediate, transversely extending, guide bars 59 are also secured to the bottom of the lower housing section in vertical alignment with the hopper ribs 53 (Fig. 3) and each serves to support and guide the adjacent edges of two of the dies. The movement of the dies into position is limited by stop pins 6i (Figs. 4 and 5), which may be set into the intermediate guide bars 59, and the dies may be securely heldin place by clamps, such as the clamp 62, suitably mounted on the lower hopper section by fastening elements 63.

The lower housing section 44 supports the upper housing section 43, as will hereinafter be described, and is in turn supported at its opposite ends by integrally cast bosses 65 that rest on brackets B6 secured to `frame plates 61 at opposite sides of the machine (Figs. 4 and S--plates 61 being omitted from Fig. 5 for clarity). The lower` housing section is locked in place by dowel pins 98, one of which is anchored in each of the bosses 65 at opposite ends of the hopper. Each dowel pin B8 projects downwardly into the associated bracket 66 and also projects upwardly into a boss 69 cast integrally with the upper housing section 113 for securely positioning the upper housing section on the lower housing section.

The upper housing section 43 and the lower housing section 44 each define half of a feedroll chamber communicating with the dough receiving chamber by way of a longitudinally extending opening of less width than the feed-roll Pairs of mating hemispherical bearing halves are formed in the bosses 65 and 69 at each end of the upper and lower housing sections to accommodate a pair of parallel feed-roll shafts 1i and 12 that extend longitudinally through the hopper and have identical feed-rolls 13 respectively mounted thereon to turn therewith within the feed-roll chamber. Preferably each of the feed-rolls 1,3 is a hollow tube that extends substantially the full length of the feedroll chamber and is closed at Vits ends by discs, such as the disc 14 (Fig. 6), pressed tightly or welded onto the associated shaft and welded in the ends of the roll tubes. The outer surfaces of the roll tubes are longitudinally grooved at uniformly spaced intervals entirely around their circumference, as shown at 16, to catch the dough and drag it downwardly between the rolls as they turn in opposite directions with their respective shafts. At each of the upper and lower compartment division plates, the rolls are circuinen entially grooved, as shownat 11 (Fig. 3), to a depth equal to or, preferably, slightly greater than the depth of theylongitudinal grooves 15, and edges of the division plates are shaped to iit into these grooves to prevent dough from seeping longitudinally from one compartment to another.

At one end of the hopper, the feed-roll shafts 'il and 12 are provided with integral end lugs 18 and 19 adapted to be received in driving en- 7' gagement by corresponding slots. 8| and'. 82, respectively, inthe ends of 1a pair of stub rdrive shafts 83-and 8B. The stub shafts Stand respectively, carry identical meshing gears and 87, whereby rotation of the stub shaft 8 in one direction imparts rotation to the other stub shaft Sii in the opposite direction at the same speed. The stub shaft 83 is driven by power applied through a small gear 88 as hereinafter described.

As noted above, each end of the hopper is shown as being provided with a pair of projecting bosses S5 and (i3 on the lower and upper housing sections,l respectively, held in alignment by a centrally disposed dowel pin GS. A pin 9| in cach boss 59, ha-ving a button shaped head, provides a bearing surface for a clamping arm Q2 adapted to hold the adjacent end of the upper hopper section downwardly in secure engagement with the-lower hopper section. The clamping arm "i:

G2 may be pivotally mounted at one end on the adiacent frame plate 61 for pivotal movement in a vertical plane passing through the center of the button head pin 9|. The clamping arm f 2 may be held downwardly against the pin Si by means of a thumb screw 93 in a bracket 9e, also pivotally mounted on the frame plate t?. This adjacent end of the clamping arm 22 is shaped to provide a cam surface 96 having a notch 9'5 therein whereby the bracket S54 may be manually swung into position with the bearing end of the thumb screw sliding over the cam surface of the clamping arm in a'counter-clockwise direction, as viewed in Fig. 5,v until the bearing end of the thumb screw snaps into the notch 9?. The thumb screw may then be manually tightened to bring the clamping arm tightly down into engagement with the head-of the pin Si. Each end of the upper housing section 153 'may thus be clanlped securely in place andyet be easily removable.

As will be apparent from the foregoing description of the construction of the hopper 2, the upper housing section 33 may be lifted upwardly and removed after freeing the clamping arms This exposes both of the feed-rolls 13, which are then also free to be lifted upwardly, with slight endwise movement away from their respective drive shafts 83 and 8f3, whereby the lugs 'i8 and 'l5 are withdrawn from the drive shaft slots SI and 8?. as the feed rolls are removed from the hopper. This in turn permits the lower division plates #i9 to be withdrawn. The dies 55 may be individually removed after loosening the clamps e2 and swinging them about their respective fastening elements 63; or the entire lower housing section it may be directly lifted from the machine before removing the dies. The ease and rapidity with which the hopper may be disassembled is highly desirable to permit thorough cleaning of the various hopper parts with a minimum of time and effort. Also, the provision for removing the dies individually from the end of the machine permits the dies to be changed at will without removing any of the other parts of the hopper whenever it is desired to change the sizes and shapes of cookies being produced from a given batch of dough.

Turning now to the cut-off mechanism 3 by which dough emerging from the dies is sliced into F of complementary arms |02 i between which the.

wire IOI is stretched and-tightened by means of a hollow bolt |03 threaded into one of the arms. The wire is knotted or otherwise provided with enlarged stops Aat its opposite ends and passes through the ends of both arms and through the hollow bolt |03 in one of the arms. The bolt IGS may be backed out of the arm in which it is threaded until the wire is drawn sufficiently taut, and a lock nut IDA-on the hollow bolt I03'is employed to prevent reverse turning of the hollow bolt during operation of the machine.

rThe arms |02, toward their opposite ends from the wire IIiI, are held apart by a strut |05 which may take the form of a tube fitted freely over bosses formed on the arms. Beyond the strut |05, the arms |02 are pulled together to balance the tension in the wire IGI by means of a tension member, such as the tube I'i, which may also t over bosses formed on the arms IZ and be secured thereto by pins |08.

Referring to the near side of the machine as viewed in the various side elevational views of the drawing, the arm |02 may be adjustably mounted between its ends on a link I I i of a linkage system designed to move the wire iti along substantially horizontal paths during its cutting and return strokes. The link IiI is pivotally mounted at one end by means of a stub shaft I I2 to the upper end of an actuating lever I I3 that is keyed to a rocker shaft I Ifl extending trans-versely of the machine from side to side thereof. The

rocker shaft IIQ may be journaled adjacent its` a pin and slot connection comprising a slot IIIY disposed in the link III at an acute angle to the horizontal, and a pin II'I in the guide lever H5.A

The guide lever II5 is-mounted to swing against frictional resistance from a stub shaft llt carried by the adjacent frame plate f'. Frictional resistance to swinging of the guide lever IIl is provided at the stub shaft IIB by means of a friction disc or washer IIS against which the end of the guide lever is pressed by a disc spring I2! compressed'by a nut |22. Thus when the actuating lever IIS swings in a clockwise direction, as Viewed in Fig. '7, the lower end of the slot II is forced against the pin II'l in drivingthe guide lever II5 counter-clockwise against frictional resistance. When the actuating lever IIS swings in a counter-clockwise direction, the upper end vof the slot IIis pulled downwardly against the pin II'i (Fig. 9) and pulls the guide lever i I5 in a clockwise direction against frictional resistance.

The actuating lever I I3 and the guide lever I I5 are of the same effective length, and when the pin II"I and slot IIIare coacting as shown in Fig. 7, the effective length of the connecting link III along its pivotal or longitudinal center line is such that the longitudinal center lines of both the actuating lever and the guide lever are vertical and normal to the pivotal center line of the link III at the same instant during their oscillation. With this relationship existing, the midpoint of the pivotal center line of the link il Ifwill `travel along `a horizontal path while theactuating lever I3 is swinging clockwise- The actuating leverv II3a on the opposite side of the machine differs slightly in shape from the actuating lever H3, for reasons hereinafter explained. In other respects, the above described linkage system is duplicated on opposite sides of the machine so that the midpoints of the pivotal center lines of the two links I|| dei-lne a horizontal line that travels under the dies on the hopper 2 at substantially the same level as the lower ends of the dies while the actuating levers H3 and |3a are swinging clockwise. By mounting the cutting wire frame so that the cutting Wire coincides with the line between these midpoints of the pi-votal center lines of the links i, the cutting Wire will travel on a cutting stroke along a horizontal path at substantially the level of the lower ends of the dies. When the actuating levers ||3 and ||3a are swung counterclockwise, as viewed in Fig. '7, and the upper ends of the slots H5 are pulled downwardly onto the pins H1 of the guide levers H5, the level of the Wire ||l| drops so that it travels well below the lower ends of the dies on its return stroke. While this action changes the length and location of the pivotal centerline of the link IH during the return stroke, these changes are so slight that the return path of the wire I 0| may also be treated as a straight line path for all practical purposes.

Vertical adjustment of the position of the wire |0| is provided for in order to compensate for slight inaccuracies or misalignment of the wire supporting frame and actuating linkage system and to insure that the wire is properly positioned with respect to the die orifices during the cutting stroke. This adjustment may readily he accomplished at the points where the wire supporting arms |02 are mounted on the links HI. As shown, each stub shaft I I2 connecting an arm |52 to the adjacent link I I is clamped tightly to the arm |02 by a bracket |26 and a pair of bolts |21 that pass through the arm and into the bracket on opposite sides of the stub shaft. The link is provided with a boss |28 that surrounds the stub shaft H2, and the surrounded portion of the stub shaft is cut away on one side to form an integral key or rib |29. Two set screws |3| are threaded onto the boss |28 in opposite directions and bear against opposite sides of the rib |29. By loosening one of the set screws ISI and tightening the other, slight rotation of the stub shaft H2 and the associated arm |02 in either direction may be effected for raising or lowering the cutting wire |0| as required for aligning its path of travel with respect to the die orifices.

To insure that the wire |0| will slide under the die orifices, rather than be broken against the dies, the lower edges of the dies are preferably rounded as shown at 32.

Swinging of the actuating levers I I3 and I I3@ through the desired angle and control of the amplitude of their angular sweep for adjusting the length of the stroke of the Wire |0| may be accomplished (see Figs. 7 and 11) by means of a cam |36 and follower |31, the follower being adjustably mounted in a slot |38 cut in a boss |39 formed on the lever ||3a at one side of the machine (the back side as viewed in all side elevational views of the drawings). The cam |35 is mounted on and keyed to a drive shaft |40 that extends transversely of the machine from side to side thereof and is journaled at its opposite ends `in bearings |4| that are respectively carried by the side plates |42 (Figs. 2 and 11) attached to or forming a part of the machine frame. A

10 manually operated clutch, hereinafter described, is employed for connecting the drive shaft |40 to a source of power.

In order to coordinate the feeding of dough from the dies with the movement of the cut-off wire |0I, the feed-rolls 13 of the hopper 2 are preferably driven from the same drive shaft |40 through which the cam |36 is driven. For this purpose, a crank |136 is keyed to the drive shaft |55 at the near side of the machine (as viewed in all of the side elevational views of the drawings). A connecting rod |41 is pivotally connected at one end to the crank |46 and at its opposite end to an oscillating block |48 of a ratchet mechanism (Figs. '1 and 8) the block |48 being mounted to turn freely on a shaft |50 mounted adjacent its opposite ends in the frame plate 61, at the near side of the machine, and in an auxiliary frame plate |5| hung from a bracket |5|a on the same frame plate B1 (see Fig. 3). The ratchet block |48 carries a spring biased pawl |52 adapted to engage a` ratchet wheel |53 that is keyed to the shaft |50. Also mounted on the shaft |50 is the gear 88 that is keyed to the shaft |50 and drives the hopper feed-roll gear 85, as described above in connection with the mechanism shown in Fig. 4.

As the block |48 is oscillated by means of the crank |46 and connecting rod |41, the pawl |52 intermittently drives the feed-rolls through the ratchet wheel |53, shaft |50, gear 88, and feedroll gear 8B. In order to control the amplitude of effective driving movement of the pawl |52 for imparting rotation of the feed-rolls through a desired angle for each stroke of the cutting wire IDE, an arcuately shaped shield plate |56 is mounted to cover a selected portion of the teeth of the ratchet wheel |53, the shield plate being riveted or otherwise suitably secured to one side of a gear segment |51, that turns freely on the shaft |50. The gear segment |51 meshes with a driving gear |58 keyed to a stub shaft |59, and the stub shaft is journaled adjacent its opposite ends in the frame plate 61 and in the auxiliary plate |5|. The stub shaft |59 projects outwardly beyond the auxiliary plate |5| and terminates in any suitable knob |55 for manually rotating the shaft |59. To lock the shaft |59 against accidental rotation, a sprocket |60 is Xed on the shaft |59 and is engaged by a spring loaded detent Ia mounted in a bracket |60b carried by the auxiliary frame plate |5|.

When the knob |55 is manually turned to rotate the stub shaft |59, the gear |58 drives the gear segment |51 meshing therewith, which in turn rotates the shield plate |56 to a desired position for limiting the eifectve movement of the pawl |52. As shown in Fig. '1, the pawl |52 is separated from the teeth of the ratchet wheel |53 by the shield plate |56 until the pawl has been moved through a substantial angle in a counterclockwise direction. When the pawl slides oi the edge of the shield plate |55, it engages a tooth of the ratchet wheel |53 and drives the ratchet wheel during the remainder of the angular travel of the pawl. The timing of this ratchet drive mechanism is determined by the angular relationship between the crank |46 and the cam |36 which turn together with the main drive shaft ill; and the amount of dough extruded through the dies before th-e cutting wire |0| begins to cut, may be increased by rotating the shield plate 55 in a clockwise direction and decreased by rotating the shield in a counter-clockwise direction in the manner described above.

When the hopper 2 isist lled with doughat the beginning of a run, allof the dough is' above thel feed-rolls. Before dough can be uniformly extruded from the thel die openings, therefore, the feed-rolls must be rotated toI substantially rlllthe vdies and the outlet passage in the lower part of the hopper between the rolls and the die orifices. Unless this lower part of the hopper is substantially filled with dough before the machine is placed in normal operation, the dough pressure at the die orifices will not be constant during extrusion, and a large number of imperfectly shaped cookies will result before uniform feeding conditions are achieved.

It is desirable, therefore, that provision be made for rotating the feed-rolls by hand to fill the space between the feedrolls and the die orices before starting normal operation of the machine. Manual rotation of the feed-rolls is readily accomplished by providing a square end |54, or suitable socket, on the main shaft l5@ of the ratchet drive mechanism' to receive a handcrank (not shown). Rotation of the shaft |50'in a counterclockwise direction' (as viewedv in Fig. 7) by'means of a hand crank'will drivethe feed-'rolls directly through the gear 88' until the'lower part of the hopper and the dies are filled with do'ugh. During this operation, any suitable' board or plate (not shown) may be clamped or otherwise held against 'the lower ends of the" dies to close the die orifices until the'lower'part of tlie hopper and the dies are completely filled with dough and all air pocketsY therein are forced out'.

The drive Ishaft |40, to whichv the cam |36 and crank |46 are keyed, may be,` driven by a clutch controlled mechanism" including a sprocket |6| that is', in turn, driven through a chain |62 by a sprocket |63 on the output shaft 54 of a suitable speed reducing mechanism |65. The driven spr`cket"|6| is mounted to turn freely on the shaft |49 and is provided with a hub |66 of large diameter' (Figs. 3, 14 and' 15). The driven sprocket is disposed between the cam E36 and the adjacent frame side plate 61. Outwardly frbr'n' the cam' |35,'a disc |61 of a positive clutch mechanism' is freely m'ountedon the 'en-:l of the drive shaft |40 and is provided near itsperiphery with an axially extending pin 58 that projects atall times into an'aperture |69 in the cam |36. The pin |68 is of sucha length that it may bepro'j'ected completely through the cam; |35 and into an aperture |1| in the driven sprocket 16|, thereby locking the cam E36 and clutch disc |61 to rotate with the driven sprocket ii Vand in turn rotate the drive shaft |49.

When the clutch plate |61 is slid outwardly on the drive shaft |40 to withdraw the pin |58 from the aperture I1| in the sprocket l the sprocket runs freely on the drive shaft, and bo'th the mechanism for moving the cutting wire and the mechanism for turning the feed-rolls of the hopper 2 are inoperative. When the clutch plate |61 is moved inwardly, the pin |58 first bears against the side of the hub |55 until rotation of the sprocket |6| brings the aperture lli into alignment withrthe pin. At this point', the pin |88 slips into the aperture |1| and effects the above described driving engagement between the sprocket IGI and the cam |36. To facilitate sliding of the pin |68 into the aperture |1| while the |12 disposedat diamet'rically lopposite points in'a groove |13 in the periphery of the clutch plate. The blocks |12 slide in the groove |13 and are pivotally connected to a lever |14 by means of a yoke |15 on the lever, and the lever is mounted for pivotal movement about a stationary fulcrum pin |16 carried by a bracket |11 mounted in any convenient manner (not shown) on an adjacent portion of the machine frame. The lever |14 is actuated by a rod |18 that is pivotally connected to the opposite end of the lever from the clutch by means of a pin |19 embraced in slots |9| in both legs (only one being shown) of a yoke |82 on the leverl |14. The rod |18 extends transversely through the machine to the near side thereof where it terminates in any suitable form of vknob or handle |83 adapted to be pushed and pulled by hand. Retention of the clutch in its engaged and disengaged positions may be effected by a spring biased -detent |84 mountedV on the side panel 24 of the machine and a pair of notches |86 and |81 in the rod |18 for receiving the detent |84 when the clutch is in its engaged and disengaged positions respectively.

Referring again to Fig. l, the-conveyor 1 carryingthe series of trays 8 preferably consists of a pair of endless chains |9| that carry the trays. The chains are disposed at opposite sides of the machine with the trays extending therebetween. and the chains run over and :are supported and guided by oppositely disposed pairs of sprockets appropriately located along the conveyor path.

'The series of sprockets for each of these chains may include a main drive sprocket |92 mounted on a transversely extending drive shaft IQSjand =a series of idler' sprockets, such as |94 to 2|4,in elusive.

The idler sprockets 20| to 201, inclusive, Within the oven 4 are mounted on stub shafts carried by the frame of the oven and are disposed in any desired arrangement to provide a path of travel of the maximum practical length within the oven and thereby keep the oven size to a minimum. When a longer oven is employed, for the purpose of increasing the'path of `travel therethrough and thereby increasing the capacity of the machine in the manner described above, the number of idler sprockets mounted within the oven may re'- main the same; but inthe event a higher oven should be employed for this'v purpose, additional idler sprockets within the oven may be required to provideadditional reversals of the direction of travel of the conveyor. While the path of travel of the conveyor within the oven, as shown in the drawing, consists principally of a series of horizontal paths or reaches, this arrangementV may be v-aried, if desired, for any particular oven design.

The 4drive shaft |93-`for the conveyor chains is journaled in bearings 2| B respectively mounted on the longitudinally extending base channels I8. The shaft is driven by a sprocket 2 |1 which is most conveniently'mounted-on the drive shaft at the back side of the machine in a position to be driven through a chain 2 8 by a second sprocket 2| 9 on the output shaft 64 of the speed reducer |65. In therembodiment of the invention illustrated herein, the upper flange of the base channel |8 is cut away at 22| to provide clearance for the sprocket 2 1.

Inasmuch as the chain is driven by the single pair of drive sprockets |92 on the drive shaft |93, the conveyor chains are under tension throughout substantially their entire length from the hopper 2 throughv the oven to the take-off mechanism at the opposite end of the machine. As a result, there is little tendency for any slack to develop in the chains along this portion of the conveyor path, and the chains run smoothly with a minimum tendency to jar the trays and Idislodge cookies carried thereby.

Along horizontal reaches of the conveyor path between various pairs of idler sprockets, and between the last idler sprocket 2| 4 and the drive sprocket |32 on each side of the machine, suitable tracks are provided for supporting the chains. These tracks are supported at convenient points on the frame of the machine as illustrated, for example, by the tracks 222 and supporting brackets 223 mounted at opposite sides of the machine on the base channel members i3 and extending between the idler sprockets 2|l and the drive sprockets |92 (Figs. 1 and 3).

The pans carried by the conveyor preferably comprise shallow, inverted channels 226 closed at their ends by bars 221 (Fig. 13), that may be welded to the channels. yOppositely directed supporting pins 228 are mounted in the bars 221 to project outwardly through the conveyor chains and serve both as pivotal supports for the trays and as connecting pins in the chains. To assist in holding the trays in horizontal positions at all times during their travel, a weight in the form of a bar 23| is suspended below each tray by a pair of' brackets 232 that may be welded to the under side of the tray and welded or bolted to the bar 23|. To assist in holding cookies on the trays in the event the trays are jarred or tilted slightly during their travel, the trays may be provided with spaced indentations 233 along the longitudinal centerlines of the trays at the centers where individual cookies are spotted as they drop from the several dies, as indicated in Fig. l5. In place of the indentations 233, holes 234 through the trays may be employed to perform the same function, as illustrated in Fig. 13.

As shown in Fig. 1, the conveyor 1, after passing under the dies of the hopper 2, passes partially around idler sprockets |96 that rotate on fixed stub shafts 233. The conveyor then passes partially around idler sprockets |91 that rotate 0n movable stub shafts 231. The xed shafts 235 are suitably journalled in the frame side plates |32, and a pair of bell cranks 238 (only one being shown) are respectively mounted thereon at opposite sides of the machine. Arms of the bell cranks 238 that extend generally horizontally from the xed shaft 238 have a suitable weight 233 supported between their free ends. Arms of the bell cranks 238 that extend generally vertically from the fixed stub shafts 236 carry movable stub shafts 231. With this arrangement, the weight 233 urges the bell cranks and associated sprockets |91 in a counter-clockwise direction about the fixed shafts 236 for maintaining a degree of tension in the conveyor chains that may be readily adjusted by adding to, or subtracting from, the weight 239.

The idler sprockets |38, |93, and 200 turn on fixed stub shafts suitably mounted in the frame of the machine for guiding the conveyor horizontally under an inclined mirror 230 and then downwardly and into one end of the oven adjacent the bottom thereof. Where the conveyor emerges from the bottom of the opposite end of the oven, the conveyor chains pass partially around sprockets 229 and extend upwardly therefrom through a cookie cooling zone 24D to a mechanism for removing the cookies from the trays and depositing them upon an auxiliary knife blade.

conveyor, generally designated 24| in Fig. 1. The cooling zone 240 between the oven 4 and the auxiliary conveyor 24| is preferably provided with side and top panels of screening or grillwork as mentioned above, and a fan 242 is mounted in the cooling zone on any suitable support 2:33 which may be secured to the frame of the machine in any desired manner.

rIhe fan 242 provides an upwardly moving current of air that is exhausted through the grillwork panel 3D at the top of the cooling zone. To obtain the maximum benefit from this current of air for cooling the cookies on the trays as they are moved upwardly toward the cookie take-o mechanism, the idler sprockets 2||1 and 2|| are suitably disposed for guiding the conveyor directly over the fan 242 and thence upwardly to idler sprockets 2|2 at the top of the machine.

From the idler sprockets 2|2 the conveyor travels downwardly at an angle under the takeoff mechanism, then partially around idler sprockets 2|3 and 2|4 and back along the length of the machine to the main drive sprockets |92.

As shown in Figs. 17 to 19, the take-orf mechanism includes a tray-tilting wire or bar 243 that serves as a cam sliding over the leading edges of the trays for giving them an initial tilt as they pass around the axis of the idler sprockets 2|2. While in their initially tilted positions, the trays, at their leading edges, contact guide brackets 241 that are mounted at opposite sides of the machine and bear against the trays at their opposite ends to continue their tilting movement until their surfaces are parallel to the sloping path of travel of the conveyor in this region.

As the leading edges of the trays pass the lower ends of the guide brackets 241 they slide under a thin edged knife blade 248 having a large scale,

saw-tooth, upper edge configuration, as shown in Fig. 17. In order to hold the surfaces of the trays firmly against the knife blade 248 so that the saw-tooth edge of the blade will remain in contact with the tray surfaces as they pass thereunder, yieldably mounted, preferably non-metallic, guide blocks 25| (only one being shown) are mounted at each side of the machine for engaging the bottoms of the ends of the trays while the tops of the trays are still engaged by the guide brackets 241 and until the trays have passed under the knife blade 248. As shown in Figs. 18 and 19, the guide blocks 25| are disposed directly under the end bars 221 of the trays and are urged upwardly against these bars by springs 252. The springs 252 are seated on brackets 253 secured to the adjacent side of the machine frame, and the guide plates are provided with rigidly attached pins 255 that extend downwardly through the springs 252 and loosely through apertures 258 in the brackets 253.

As best shown in Fig. 17, the saw-tooth configuration of the knife blade 248 is so proportioned that the apexes of the teeth are spaced apart a distance twice that between the centers of the cookies on the trays. As the trays travel downwardly under the knife blade, each cookie is engaged by a sharp side edge of a tooth of the Because theA blade hugs the tray surface, it slides under the` cookies and tends to rotate them slightly about their axes normal to the trays, as well as to pry them upwardly oli` of the trays. This action has been found to be highly effective in removing vthe cookies from the trays with a minimum of cookie breakage.

When the cookies are thus freed from the trays, they slide downwardly over the-knife blade. 248

and down' az chute formedi--byai numberaof Vclosely spaced, curved y wires 251. that :permit free-circulation .of` air from `the :fan 242 Yfor additional cooling. The upperends gof. the wires-:may` bey secured to the lower edge ,oftheknife bladev248, as by welding, and adjacent `ltheirlower ends, they may be supportedv onrartransversely extending member 258 that is. fastened atlits` opposite ends in anyisuitablefmanner tothe. frame ofthe machine.

Cookies sliding off the lower. end ;off the lchute are deposited .upon'the.auxiliaryfconveyoi' 24|, which may suitably comprise` an open meshrscreen forming; an` endless belt. Below lthe Alower end of the chute, the screenZSl mayturnaround a drivingl roller 262 mountedonanditurning with a shaft 253. .The shaft 263rmayfbe'journaled at its opposite endsin. anysuitable. frame structure, such asframe .plates 264 vextending outwardly from the frame of the `.machine adjacent the take-off mechanism. .At.onei'end, .the

- vide more time for additional cooling.

The auxiliary conveyor 24| may extend :any

Ydesired distance to aV suitable point -for removing the cookies therefrom, either by hand or by any suitableCollectingmechanism (not shown). f`An operator standing `at this-point may lookpinto the Amirror 230 Aand'see that cookies are-being properly formedandfspotted onV the trays. The

purpose of making the conveyor belt 26|- ofopen "mesh,fscreen'rnaterialis to facilitate the passage l of air'therethrough"forfadditional cooling of the" cookies. If-desired,'a' fan (not shown) may-also be located below the-auxiliary conveyor for blowing a `stream Aofair upwardly therethrough.

WhenJthe trays have traveled from the take-olf 'mechanism back" to the main drive sprockets` |92 and begin theirupward'travel toward the 'hopper 2, theyareengaged by acentrally disposed, curved bar` 21 Ivthat-maybemounted inI any suitable manner (not'shown) and acts `as -a cam to' tilt theitrays iinto alignment with their upward path of travel. While in this positionthe trays may passby'the rotating brush 6 adapted to clean the traysof any adherent cookie crumbs .before they again pass under the vhopperf2. The brush `6 may .be mounted to AturnWwithdtst shaft 213, and the shaft213 may carry apulley-ZM-Y-at ,one end. ,thereof adapted to be` driven by'afbelt 216 .passing arounda'drive pulley 211'associated with thepcwer supplying mechanism Ahereinafter described. Depending' upon the severity of'the .tray cleaning problem, the :brush' 6 may'bepro- Avided `with either .Stiff wireY bristles"2`|2"or"with softer natural or synthetic bristles.

While the traysare passing by'thebrush, the endsthereof are engagedat their backsides by a pair-of lnarrowguide platesf218 .(onlyone being shown) for holding .the..trays .againstifthe brush. These plates. may .be .disposed to .engage theedgesof .the -bars 221. at .the.ends of` thetrays,

16 :.andtheymay bemounted. .on :theframe of the fmachine in anyfsuitablez-manner (not shown) z-For; proper spotting of the fcookies Von the trays ft-astheypass underz the hopper dies, it has been found Inecessary yto provide .for .vertical adjustment of the path ofY travel of. the trays under vthe dies. The distance between the die orifices and -the top surfaces of thetrays is preferably adjusted as indicatedv in Fig. 16 so that the leading edges of the cookies being cut drop down and touch the trays just as the cutting wire completes its cut. As the leading edges of the cookies'touch'the trays, they tendto stick thereto and cause the cookies to be uniformly aligned onthe .trays as they fall. This prevents throwking of the cookies by the cutting wire. In Fig. 16 a` tray is shown in solid outline at the proper elevation to receive a smalll diameter cookie from .a small die `also shown in rsolid outline. In .phantom outline, the tray is shown .at -a lower levelfor receiving a larger diameter cookie from l-a larger die. It will beobserved that, in both instances, the leadingl edges of the cookies are -in contact with the trayas the cutting stroke of the wireis` completed.

Inaddition to providing for vertical adjustment of the path of travel of the trays under the hopper dies, the positions ofthe trays along this path-must also be adjustable with changes in the cutting stroke Vto insure that the trays will be directly under the dies-when the cookies drop therefrom. Tovprovide for the required-horilzontalyas well as vertical, adjustment of the tray positions with respect to the hopper dies .the idler'sprockets |94 are mounted in fixed po- -sitions on stub shafts 28| for maintaining a'xed path of .travel of .the tra-ys adjacent the brush 4l; vand the idler sprockets |95 are mounted on stub shaftsi-282 that are in turn-.mounted on a suitable frame for-adjusting the positions of the 'sprockets both horizontally and vertically.

As best shown in Figs. '1 and 13, the stub shafts `282 for the adjustable idler sprockets are respectively mounted in the free ends of a pair oflevers 284. The levers .284 are disposed out- -wardly of the idler sprockets |95 and are rigidly :mounted at their opposite endsv on a sleeve 285 `surroundinga pivot shaft 283 for'rotation thereon. .An-actuating arm286, which may be cast integrally with one of the levers 284, is provided for rocking both of the levers and their connecting sleeve 285 as a unit-about the pivot shaft 283.

Movement of the actuating arm 286 may be .accomplished by meansY of a hand crank (not shown) .adapted to be -applied to a shaft 281 mounted on the frame of the'machine in a fixed, suitably supported bearing 288 so as to restrain the shaft 281 against axialmovement with respectto'thevbearing and the frame of the inachine. The shaft 281 extends through thebearingZBBandthreadedly engages a blockl 289 connected to the end of the actuating arm 286 by means of a link 29|. Rotation of the shaft 281 in .one direction causes the block 289 to travel zalong .the shaft andswings the -actuating arm .286 one direction. Y.Reverse .rotation of .the shaft 281 swingsthe actuating arm 286 in the opposite direction. This movement of the actuating-arm. 288 is transmitted to the levers 284 .for imparting similar-.movement to the sprocket .stub shafts 282 thuschanging the horizontal location ofthe beginning of the generally horizontal reach of the conveyor that .extends for- .wardly under-the hopper 2.

As viewed in Fig. 7, clockwise movement of the shafts 282 about the pivot shaft 283 results in movement of the trays under the hopper in a backward direction along their path of travel, and counter-clockwise movement of the shafts 282 results in movement of the trays in a forward direction along their path of travel. Such forward or rearward movement of the horizontal reach of the conveyor below the hopper 2 is compensated by rocking of the bell cranks 238 of the chain tension regulating device, described above, without materially altering the chain tension or causing any overall travel of the conveyor as a whole.

Vertical adjustment of the position of the pivot shaft 283 is permitted by the link 29| without substantially altering the positions of the sprocket stub shafts 282 with respect to the pivot shaft 203. Such vertical adjustment of the position of the pivot shaft 283 may be accomplished by mounting this shaft rigidly at its opposite ends in a pair of vertically disposed arms 292, each of which has a rack 293 formed on the lower end thereof. The arms 292 are slidably mounted in vertical guide members 294 carried by brackets 293 secured to the frame side plates 61 as shown in Fig. 3. The guide membersv 294 are provided with bosses 295 in which the stub shafts 28| for the idler sprockets |94 are mounted.

A pinion shaft 291 extends transversely of the machine between bearings 298 also carried by the brackets 290, and a pair of pinions 299 are mounted on and keyed to the pinion shaft 291 for engagement with the racks 293 respectively. At the left hand side of the machine, as viewed in Fig. 13, the pinion shaft 291 extends outwardly through the side panel 24 and terminates in a hand crank 300 provided with a suitable spring-loaded pin 30|, or the like, adapted to enter any selected one of an arcuate array of holes in a fixed plate 305 for holding the crank in a selected position in a well known manner. Adjustment of the position of the hand crank 300 eiects rotation of the pinion shaft 291 and the pinions 299 thereon. By adjusting the position of the hand crank 390, the arms 292 may be moved upwardly and downwardly as required to adjust the vertical position of the pivot shaft 283 and the entire lever structure upon which the idler sprockets |95 are mounted. This results in Vertical adjustment of one end of the generally horizontal reach of the conveyor extending under the hopper.

While vertical adjustment of the position of the pivot shaft 283 causes slight angular movement of the link 29| about its pivot points, and thus alters the adjustment of the horizontal positions of the trays to a small degree, and while rotation of the actuating shaft 281 to rock the associated lever mechanism also aifects the vertical adjustment of the path of travel of the trays to a small degree, it will be apparent that both the horizontal and vertical adjustment may be accomplished by appropriate manipulation of both the actuating shaft 281 and the pinion shaft 291. By these two adjustments, the positions of the trays may be accurately set with respect to the hopper dies for uniform spotting of the cookies on the trays in the manner described and illustrated in Fig. 16.

The driving of the various parts of the machine during its normal operation is preferably accomplished by suitable power take-offs from a single motor 302. Referring principally to Figs. 2 and 3, this motor may be mounted on a base 303 pivotally supported at one end by a pin 304 carried in the upper ends of a pair of arms 306. The arms 306 are in turn mounted at their lower ends on a sleeve 301 to which they may be welded or otherwise rigidly secured. A second support for the motor base 303 may be mounted on the sleeve 301 and may consist of an elongated boss 308 having a bolt 309 threaded longitudinally therein and extending upwardly with its head engaging the underside of the motor base 303. The bolt 309 may carry a lock nut 3I| whereby the bolt may be securely locked for holding the motor base in a desired angular position with respect to the pivot pin 304.

The sleeve 301, by which the motor base is supported, as described above, is rotatably mounted adjacent its opposite ends in brackets 3| 2 and 3|3 supported in any suitable manner on the base of the machine. Rotation of the sleeve 301 in its supporting brackets 3|2 and 3|3 for adjusting the motor position about the axis of the sleeve, may be controlled by means of a radially extending lever 3M that projects upwardly and carries a threaded nut 3||3 pivotally mounted on the lever 3|4 for receiving a threaded control shaft 3|1. The shaft 3|1 is threaded at one end into the nut 3|8 and projects to the right, as viewed in Fig. 2, terminating beyond the end of the machine in a portion 3|5 shaped for engagement by a hand crank (not shown). The control shaft 3|1 is pivotally mounted in a suitable bracket 3|8 carried by the frame of the machine for restraining the shaft against longitudinal movement while permitting it to turn about its own axis and oscillate within limits about a horizontal axis normal thereto. For simplicity, the details of this mounting are omitted. When the control shaft 3|1 is rotated, the nut 3|6 travels therealong for rotating the control lever 3|4 and thereby controlling the angular position of the motor with respect to the axis of the supporting sleeve 301.

The motor shaft 3|9 carries a conventional pulley 32| and a variable diameter pulley 322 for respectively supplying power to the brush 6 and the speed reducing mechanism |95. A flat belt 323 may be employed to connect the conventional pulley 32| to a conventional driven pulley 323, and a V-belt is employed to connect the variable pulley 322 to a pulley 321 on an input shaft 33| of the speed reducing mechanism.

The conventional driven pulley 326 is mounted on one end of an idler shaft 328 that is in turn mounted for rotation within the motor supporting sleeve 301. At its opposite end the idler shaft 328 projects outwardly beyond the sleeve 301 and carries the pulley 211, referred to above, for driving the brush 6 through the connecting belt 210.

As best viewed in Fig. 2, rotation of the motor 302 about the sleeve 301 serves to adjust the distance between the motor shaft 3|9 and the input shaft 33| of the speed reducer. This changes the tension in the v-belt 324, by which the effective diameter of the Variable pulley 322 is regulated, and thereby changes the speed of the input shaft 33| of the speed reducer. In this manner, the speeds of the conveyor, the cut-off mechanism, and the hopper feed-rolls are readily controlled without alecting the distance between the motor shaft 3|9 and the idler shaft 32 8. This latter distance may be adjusted to maintain proper tension in the at belt 323, without materially aifecting the above described speed control, by rotating the motor supporting bolt 309 19 in the boss 396 to rock the motor aboutthe pivot pin 394.

When placing the machine of this invention in operation, the burners in the oven -4 are rst turned on to bring the oven up to the desired temperature. While the oven is heating the h opper 2 may be filled with a previously prepared dough. Diiferent, previously prepared doughs may be placed in the separate hopper compartments 45, 46, and 41, if desired. With the die orifices temporarily closed, as described above, a hand crank is then applied to the crank-receiving end |54 of the shaft |59 associated with the ratchet drive for the hopper feed-rolls, and the crank is turned in a counter-clockwise direction, as viewed in the drawings, for rotating the hopper feed-rolls until dough from the hopper. cornpartments has been fed downwardly to iill the hopper outlet passage and the `dies associated therewith.

The motor 3D2 may then be turned on for driving the conveyor "I withthe tension in the \l.-belt 324 set to provide the desired ratiobetweenthe speed of the motor shaft 3|9 and the speed of the input shaft 33| to the speed reducing mechanism |65. When the motor 302 is started,the clutch control knob |83 should be in its withdrawn position shownin Fig. 14 so that the clutch for the drive shaft |4Dis disengagedand the cutoff `mechanism and ratchet drive for the feedrolls are inoperative.

Before engaging the clutch for the driveshaft L40, the handcrank 3,00 should be adjusted to rotate the pinion shaft 29.1 for adjusting the vertical spacing between the .hopper dies and the trays as required by the dimensions of the die orices.

Upon pushing the clutch controlknob |83 inwardly to engage the clutch associated with the drive shaft |40, the ratchet mechanism fordriva ing the feed-rolls and the cam-actuatedicut-off mechanism are started vin operation. A hand crank should be applied at once tothe actuating shaft 281 for rockingthe levers 284 tocoordinate the horizontal travel of the conveyor traysund'er thedies with the operation of thecut-off mechanism for centeringthecookies onthelongitudinal center lines of the trays. At the same time, further adjustment of the pinion shaft 291 may be required for moreY accurate adjustment of the spacing between the dies andthe trays therebelow. Any required adjustment. of the rateof feed `from the hopper may be effectedby altering the position of the arcuate shield plate |56. in the ratchet drive for the feed-rolls, as described above.

VI n this manner the movement and position of the trays below the diesmay be quickly adjusted s o that the cookies dropping from the dies will be accurately spotted on the trays, as described, with reference to Fig. 16. As a result of the adjustments of the path ,of travel and movement ofthe trays under the dies, and as a result of the pre-filling of the dies with dough .byv manual rotation of the shaft |59, clean cutting of perfectly formed cookies and proper spotting ofthe cookies on the trays are obtained in a minimum of rtime and with a minimum waste of dough during the adjustment period. Thethickness of the cookies may also be readily varied at will by turning the knob |55 to adjust the ratchet mechanism by which the extrusion thickness is controlled.

The cookies deposited on the trays are carried thereby successively around the idler sprockets |95, |91, |98, |99, and 29|! toward the opening 4| 20 leading into the oven 4 adjacent the bottom thereof. From this point the trays travel upwardly within the `oven and around the idler sprockets 29| Where they begin their series of horizontally traveling movements through the.

oven. As the trays pass around the rst idler sprockets 25| in the oven, they pass under the ash heaters I3 where they may be subjected to a brief period of intense heating for initially set-V ting a skin on the dough to prevent further lateral spreading thereof and obtain other desiredbaking effects. After passing around the idler sprockets 2&2 to 286, inclusive, thetrays pass under a second set of ash heaters |4 for again subjecting the cookies to a brief period of intense heating to brown the upper surfaces thereof. This completes the baking of the cookies, and the trays then pass around the idler sprockets 231 and 298 to the oven exit opening 42 and thence around the idler sprockets 269 for upward movement through the cooling zone 24U.

During travel of the trays through the cooling zone 243, a blast of air is directed against the undersides of the trays by the fan 242 for cooling the trays and the cookies carried thereby before the trays reach the cut-off mechanism 5.

Upon passing around the idler sprockets 2|2 at the top of the cooling zone, the trays are-contacted 'by the tilting bar 246 lfor giving the trays an initial tilt and guiding them under the side guides 24.1. The side guides 247 complete the tilting of the trays into the plane of the knife blade 248 so that the knife blade Will slide over the tray surfaces for removing the cookies. The yieldably mounted guide blocks25| assist in holding the trays firmly against the knife blade 248 to insure that the knife blade slides under the cookies and pries them away from the -tray surfaces rather than.contactingthe'cookies edgewise and pushing them along the tray surfaces. This action is also facilitated by the holes or depressions in the trays which embrace knobs on-the bottoms of the cookies and thereby hold them somewhat against sliding as the knife blade contacts them.

As the cookies arerfreed from the trays, they slide down the chute wires 251 andare deposited upon the endless conveyor screen 26| for travel to a convenient point for manual or automatic removal. During travel of the cookies alongthe screen conveyor 25| additional Vcooling of the cookies is obtained `by reason of the open mesh structure of this conveyor which permits air to move freely therethrough. As noted aboveQan additional fan may be employed, if desired, to increase this air movement.

After the cookies have been removed, the, trays pass around `the idler sprockets 2 l3 and 2|4 vin the course oftraveling downwardly to the b ase of the machine. Between the idler sprockets 2| iA at one end of the machine, and the drive sprockets |92 at the opposite end of the machine, the long horizontal reach of the conveyor is sup'- ported by the tracks 222.

As the trays pass around the drive sprockets |92, they are engaged by the tilting bar 27| and then by the guide plates2l8 for tilting and ,holding the trays in alignment with their generally upward path of travel past the` rotating brush 6, which scours the tray surfaces free from adherent crumbs to prepare them for again receiving dough from the hopper dies. Upon passing beyond the guide plates 273the trays arepfrmitted to return to their normal horizontally disposed positions, which they maintain until they again 2i reach the take-olf mechanism at the opposite end of the machine.

As will be apparent from the foregoing description of the invention, several important improvements in machines of this character have been achieved. The general arrangement of the principa1 parts of the machine on the unitary base permits the manufacturer of the machine to vary its capacity merely by providing a longer base and a longer oven section between the hopper the dies therefrom for changing cookie shapes,

with ease and rapidity. The hopper may be completely disassembled and the feed-rolls removed and the dies may be individually or collectively removed from the machine entirely from the hopper end thereof Without disassembling any of the mechanism by which the hopper feed-rolls are driven and without requiring the removal of any of the panels of the machine housing other than the end panel adjacent the hopper. vThis invention also provides a hopper construction which makes it possible for different types of dough or batter to be handled in adjacent compartments of the hopper for producing different types of cookies simultaneously.

The invention also provides mechanism by which substantially perfectly formed cookies may be produced after but a few initial strokes of the cut-orf wire and by which the cookies may be uniformly and accurately spotted on the trays.

The invention also provides a simplified cutoff mechanism that may be adjusted for cutting cookies of diierent sizes with equal precision and means for effecting this adjustment quickly from one side of the machine.

The invention also provides an improved tray construction and cookie take-oir mechanism whereby cookies may be conveyed through the oven and thereafter removed from the machine with a minimum of spilling of cookies from the trays and breakage of cookies during their removal.

These and numerous other improvements embodied in the general design and mode of operation or the machine of the present invention contribute to the accomplishment, with a high degree of perfection, of all of the various objects set forth in the introductory portion of this specication.

While the invention has been described with reference to a specific embodiment shown in drawings for illustrative purposes, it will be apparent that many novel principles of operation are involved and that many variations in the mechanism for carrying out these principles are possible without departing from the scope of the invention as defined in the appended claims.

Having described the invention and its mode of operation in detail, we claim:

1. Mechanism for cutting material emerging from a die comprising a supporting structure, a pair of levers mounted on said structure for oscillation about spaced, parallel, i-lxed axes and having movable axes thereon disposed closer together than their iixed axes and parallel thereto, a link pivotally connecting said movable axes, and a cutting wire disposed between said movable axes and mounted for movement with said link and extending parallel to all, of said axes.

2. The mechanism of claim 1 in which said.. levers are of equal length between their fixed andi4 movable axes and said wire is disposed substantially midway between said movable axes and substantially in the plane thereof.

3. The mechanism of claim l in which said levers are of equal length between their xed and movable axes and said wire is disposed substantially midway between said movable axes and substantially in the plane thereof, the longitudinal axis of said link intersecting the longitudinal axes of said levers at supplementary angles.

4. The mechanism of claim l, including driving means for oscillating said levers and link, and means adjustably connecting said driving means to one of said levers at varying distances from its center of oscillation for varying the angle through which it oscillates.

5. The mechanism of claim 1, including means for adjusting the position of said cutting wire transversely with respect to said link.

6. In a cookie machine, a supporting structure, a die mounted on said structure, and mechanism mounted on said structure for cutting material emerging from said die, said mechanism comprising a rst lever pivotally mounted on said .structure for oscillation about a iirst axis and extending upwardly therefrom, a second lever pivotally mounted on said structure for oscillation about a second axis spaced from and par- .allel'to said rst axis, said second lever extending downwardly from said second axis, a link pivotally connected to said levers on axes parallel to said rst and second axes and located so that Y the effective radial lengths of said levers are equal, the effective lengths of said link and l f levers between their pivotal axes being such that,

:at a given instant, the plane dened by the pivotal axes of the link may be substantially normal to the effective radii of the levers, and a taut wire mounted for movement with said link and disposed parallel to and substantially midway 'between and in the plane of the pivotal axes of the link.

7. In a cookie machine, a supporting structure, :a die mounted on said structure, and mechanism mounted on said structure for cutting material Iemerging from said die, said mechanism comjprising a rst lever pivotally mounted on said .structure for oscillation about a iirst axis and extending upwardly therefrom, a second lever jpivotally mounted on said structure for oscillation about a second axis spaced from and par- :allel to said first axis, said second lever extend- :ing downwardly from said second axis, a link ,pivotally connected to said levers on axes par- .allel to said iirst and second axes and located so that the elective radial lengths of said levers are equal, the effective lengths of said link and levers between their pivotal axes being such that, at a given instant, the plane defined by the pivotal :axes of the link may be substantially normal to the effective radii of the levers, a taut wire mounted for movement with said link and disposed parallel to and substantially midway between and in the plane of the pivotal axes of the ilink, and means for oscillating said levers to efifect substantially straight line travel of said wire :in a direction transverse to its length.

8. In a cookie machine, a supporting structure, .a die mounted on said structure, and mechanism mounted on said structure for cutting material emerging from said die, said mechanism coinprising a iirst levei` pivotally mounted on said structure for oscillation about a rst axis and extending upwardly therefrom, a second pair of levers pivotally mounted on said structure for extendmg" dnwnwardly,.flzomsaid second ms. a,

link... pvotally, connected itowv said .levers on axes. parallel; to,` saidrst an'5i.second .axes sothat the Number; "Name:4 Date.

209265u smith, oct. .29, 1873K 2,539511@V j Ludingtoq en al. Jam 30,195.1., 

